1. Evaluating Cognitive, Emotional, and Physical Fatigue Domains in Daily Practice by Single-Item Questions in Patients With Advanced Cancer: A Cross-Sectional Pragmatic Study 
Florian Strasser, MD, Iris Müller-Käser, MD, Daniel Dietrich, PhD 
Journal of Pain and Symptom Management 
Volume 38, Issue 4, Pages (October 2009)
DOI: /j.jpainsymman
Copyright © 2009 U.S. Cancer Pain Relief Committee Terms and Conditions

2. Fig. 1
Two-factor model of physical and cognitive fatigue: rotated factor plot with positions of domain-SIFs and corresponding functional subscales of EORTC QLQ-C30 and FAQ. SIF: single-item fatigue: emotional (SIFemot), cognitive (SIFcogn), and physical (SIFphys). FAQ: Fatigue Assessment Questionnaire domains: physical (FAQphys), cognitive (FAQcogn), and affective (FAQemot). EORTC: EORTC QLQ-C30 functional subscales: physical (EORTCphys), emotional (EORTCemot), and cognitive (EORTCcogn).
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )
Copyright © 2009 U.S. Cancer Pain Relief Committee Terms and Conditions